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STEP 1. Starting VISA
The VISA system startup session is processed in Line 90 in the sample
program ctrl_ext.vba. VISA's viOpenDefaultRM function initializes and starts
up the VISA system. The viOpenDefaultRM function must be executed
before other VISA functions are called, and the parameter of this function
is startup information (Defrm in ctrl_ext.vba).
Syntax
viOpenDefaultRM(param)
Parameter
Parameter (param)
Description Startup information (output)
Data type Long integer type
STEP 2. Connection
The connection session is handled in Line 130. VISA's viOpen function
makes connection with the specified instrument. The viOpen function